Artifacts

Compiled contracts can be represented by so-called artifacts. These artifacts contain all information that is needed to interact with the smart contracts on-chain. Artifacts are stored in .json files so they can be shared and stored for later usage without having to recompile the contract.

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Artifacts allow any third-party SDKs to be developed, since these SDKs only need to import and use an artifact file, while the compilation of the contract is left to the official cashc compiler.

Artifact specification

interface Artifact {
  contractName: string // Contract name
  constructorInputs: AbiInput[] // Arguments required to instantiate a contract
  abi: AbiFunction[] // functions that can be called
  bytecode: string // Compiled Script without constructor parameters added (in ASM format)
  source: string // Source code of the CashScript contract
  compiler: {
    name: string // Compiler used to compile this contract
    version: string // Compiler version used to compile this contract
  }
  debug?: {
    bytecode: string // unlike `bytecode` property above, this is a hex-encoded binary string
    sourceMap: string // see documentation for `generateSourceMap`
    logs: LogEntry[] // log entries generated from `console.log` statements
    requires: RequireStatement[] // messages for failing `require` statements
  }
  updatedAt: string // Last datetime this artifact was updated (in ISO format)
}

interface AbiInput {
  name: string // Input name
  type: string // Input type (see language documentation)
}

interface AbiFunction {
  name: string // Function name
  inputs: AbiInput[] // Function inputs / parameters
}

interface LogEntry {
  ip: number; // instruction pointer
  line: number; // line in the source code
  data: Array<{ stackIndex: number, type: string } | string>; // data to be logged
}

interface RequireMessage {
  ip: number; // instruction pointer
  line: number; // line in the source code
  message: string; // custom message for failing `require` statement
}